How to open the lid on the laptop
Ok I am not sure exactly what you are trying to do. 


In edit mode make sure you have the option to select faces.
Click random faces on the top and along the sides and corners, then Hold Ctrl and then hit the + on keypad about 15-20 times to make sure you got the entire top lid selected. 
Hit P to seperate the object, Position the top lid how you would like it to be open, follow the link "how to create a hinged door" suggested in the above comments section.
Once the object is where you want it, select everything and hit CTRL+J to join it all back to one. 


keep in mind nothing is modeled on the inside where the computer screen would be, so you would need to put something there